12 years old boy died from brain eating parasite.

Zachary Reyna, a 12-year-old Florida boy stricken with a brain-eating parasite, has died, according to a post Saturday on a Facebook page that's been providing detailed updates from the boy's family.

The post indicated that the LaBelle child died Saturday afternoon.

"The battle is over for Zac but he won the war," the post concluded.

Doctors had given Zachary an experimental drug to treat the rare amoeba, called Naegleria fowleri, that he had.

Zachary's family told CNN affiliate WBBH they believe that the boy -- who they described as an active seventh-grader -- was infected while kneeboarding with friends in a water-filled ditch by his house on August 3.

After he was hospitalized, the boy underwent brain surgery, and doctors diagnosed him with primary amoebic meningoencephalitis, according to WBBH.

After news emerged regarding Zachary's diagnosis, the Florida Department of Health issued a warning to swimmers that high water temperatures and low water levels provide the perfect breeding ground for this rare amoeba.

 The amoeba enters the body through the nose and travels to the brain. There is no danger of infection from drinking contaminated water, the CDC said.

"This infection is one of the most severe infections that we know of," Dr. Dirk Haselow of the Arkansas Department of Health told CNN affiliate WMC about Kali's case. "Ninety-nine percent of people who get it die."

The first symptoms of primary amoebic meningoencephalitis appear one to seven days after infection, including headache, fever, nausea, vomiting and a stiff neck, according to the Centers for Disease Control and Prevention.

"Later symptoms include confusion, lack of attention to people and surroundings, loss of balance, seizures and hallucinations," the agency website says. "After the start of symptoms, the disease progresses rapidly and usually causes death within one to 12 days."